Year	1=low to 6=high
2005	4
2006	4
2007	4
2008	4
2009	3.5
2010	4
2011	4
2012	4
2013	4
2014	4
2015	4
2016	4.5
2017	4.5
2018	4.5
2019	4.5
2020	4.5
2021	4.5
2022	4.5
2023	5